Method for Obtaining a copy of the optional RPMs?

I'm working with a closed network, so I cannot simply enable the optional RPMs repo and install the packages over the internet.

Many of the other RHEL repo's exist within one of the distributed ISOs, such as the high-availability and resilient storage, as well as the standard RHEL server/workstation packages. For these I can host the repos on a server on the closed network to make them available to any hosts that need them.

I am wondering if it's possible to download the full extra packages repo for RHEL 7 from the RHEL site so that I can host it on my closed network as well, rather than downloading individual packages and building a repo myself.